/* stylelint-disable */
.bezierEasingMixin() {
  @functions: ~`(function() {
      var NEWTON_ITERATIONS=4;
      var NEWTON_MIN_SLOPE=0.001;
      var SUBDIVISION_PRECISION=0.0000001;
      var SUBDIVISION_MAX_ITERATIONS=10;

      var kSplineTableSize=11;
      var kSampleStepSize=1.0 / (kSplineTableSize - 1.0);

      var float32ArraySupported=typeof Float32Array==='function';

      function A (aA1, aA2) {
        return 1.0 - 3.0 * aA2 + 3.0 * aA1;
      }

      function B (aA1, aA2) {
        return 3.0 * aA2 - 6.0 * aA1;
      }

      function C (aA1) {
        return 3.0 * aA1;
      }

      // Returns x(t) given t, x1, and x2, or y(t) given t, y1, and y2.
      function calcBezier (aT, aA1, aA2) {
        return ((A(aA1, aA2) * aT + B(aA1, aA2)) * aT + C(aA1)) * aT;
      }

      // Returns dx/dt given t, x1, and x2, or dy/dt given t, y1, and y2.
      function getSlope (aT, aA1, aA2) {
        return 3.0 * A(aA1, aA2) * aT * aT + 2.0 * B(aA1, aA2) * aT + C(aA1);
      }

      function binarySubdivide (aX, aA, aB, mX1, mX2) {
        var currentX, currentT, i=0;

        do {
          currentT=aA + (aB - aA) / 2.0;
          currentX=calcBezier(currentT, mX1, mX2) - aX;

          if (currentX > 0.0) {
            aB=currentT;
          }

          else {
            aA=currentT;
          }
        }

        while (Math.abs(currentX) > SUBDIVISION_PRECISION && ++i < SUBDIVISION_MAX_ITERATIONS);
        return currentT;
      }

      function newtonRaphsonIterate (aX, aGuessT, mX1, mX2) {
        for (var i=0; i < NEWTON_ITERATIONS; ++i) {
          var currentSlope=getSlope(aGuessT, mX1, mX2);

          if (currentSlope===0.0) {
            return aGuessT;
          }

          var currentX=calcBezier(aGuessT, mX1, mX2) - aX;
          aGuessT -=currentX / currentSlope;
        }

        return aGuessT;
      }

      var BezierEasing=function (mX1, mY1, mX2, mY2) {
        if ( !(0 <=mX1 && mX1 <=1 && 0 <=mX2 && mX2 <=1)) {
          throw new Error('bezier x values must be in [0, 1] range');
        }

        // Precompute samples table
        var sampleValues=float32ArraySupported ? new Float32Array(kSplineTableSize) : new Array(kSplineTableSize);

        if (mX1 !==mY1 || mX2 !==mY2) {
          for (var i=0; i < kSplineTableSize; ++i) {
            sampleValues[i]=calcBezier(i * kSampleStepSize, mX1, mX2);
          }
        }

        function getTForX (aX) {
          var intervalStart=0.0;
          var currentSample=1;
          var lastSample=kSplineTableSize - 1;

          for (; currentSample !==lastSample && sampleValues[currentSample] <=aX; ++currentSample) {
            intervalStart +=kSampleStepSize;
          }

          --currentSample;

          // Interpolate to provide an initial guess for t
          var dist=(aX - sampleValues[currentSample]) / (sampleValues[currentSample + 1] - sampleValues[currentSample]);
          var guessForT=intervalStart + dist * kSampleStepSize;

          var initialSlope=getSlope(guessForT, mX1, mX2);

          if (initialSlope >=NEWTON_MIN_SLOPE) {
            return newtonRaphsonIterate(aX, guessForT, mX1, mX2);
          }

          else if (initialSlope===0.0) {
            return guessForT;
          }

          else {
            return binarySubdivide(aX, intervalStart, intervalStart + kSampleStepSize, mX1, mX2);
          }
        }

        return function BezierEasing (x) {
          if (mX1===mY1 && mX2===mY2) {
            return x; // linear
          }

          // Because JavaScript number are imprecise, we should guarantee the extremes are right.
          if (x===0) {
            return 0;
          }

          if (x===1) {
            return 1;
          }

          return calcBezier(getTForX(x), mY1, mY2);
        }

        ;
      }

      ;

      this.colorEasing=BezierEasing(0.26, 0.09, 0.37, 0.18);
      // less 3 requires a return
      return '';
    }

  )()`;
}

.bezierEasingMixin();